The girls' mother, Jaqi, first signed them up to be models when they were just six months old. But they weren't really booking gigs as babies, since Jaqi had a hard time juggling that as well as raising a two-year-old son.

On July 7, 2017, though. Lela and Ava turned seven years old, and Jaqi took it as a sign. She created an Instagram account for them, @clementstwins, and in less than six months they'd racked up over 139,000 followers.

Then, at the end of December of that year, DailyMail.com covered the twins with pictures and quotes from their blog, written by Jaqi.

'It was at that time that the Daily Mail published an article on them,' she told BuzzFeed. Soon, their follower count reached 1.1 million, meaning more opportunities for the girls.

'This past year has been really fun and exciting for Ava and Leah. Whether it be private shopping experiences, gifted merchandise from brands all over the world, or taking pictures with fans, the girls have had an amazing ride so far,' said their mom.

'Of course, what’s most important to them is the friends they’ve made along the way.'

She elaborated in a 2018 blog post: 'They meet a new "friend" for 10 minutes at an audition or a shoot and are already asking me if this new friend can be their cousin, because a simple friendship just doesn't quite express the love they have for their new friend!'

The girls still go to school, and any jobs they book are scheduled for the afternoon or the weekend so they don't miss class.

If they do have to miss some school — perhaps because they got a gig through one of their agencies, which include LA Models, Eris Talent Agency, and God & Beauty — Jaqi said there is a teacher on set.

'On days they aren’t working, they go to school and then usually go to swim practice, dance class, or play outside with their friends in the neighborhood.

Though their work involves posing for lots of photos, their mom is the one actually posting on Instagram and manning the account.

She said that sometimes, she will let the girls ask their fan a question or do a live video, but mom is in charge of filtering the comments they hear.

The twins seem to have been all for their modeling side hustle from the beginning.

'I presented my idea to the girls that if they were up for it, in addition to their dance classes and swim team practices they had every week, they could give modeling a try,' Jaqi wrote in a 2017 blog post. 'I was not surprised at all when they started jumping up and down and couldn't wait to begin.'

Just before Christmas of that year, they did six jobs in the space of a week. According to their mother, they're 'lovin' every minute!'

The girls have been described as 'absolutely stunning,' 'so beautiful,' and 'really truly gorgeous girls' by followers, with some even branding them 'the most beautiful girls in the world'.

The boost! The Clements twins Leah Rose and Ava Marie had built a following of 139,000 before DailyMail.com covered them in 2017

Working: Their mother first signed the girls up as models when they were six months old, but it's only now that their career has taken off

Pretty: The girls have won dozens of contracts, posing for children's clothing brands and magazines

'Aside from the fact that I'm a huge believer in signs and have been told by almost everyone that 7 is a lucky number, I just had a feeling that this year was going to be a fun and exciting year for them,' Jaqi wrote the year they turned seven.

The sisters aren't the only models in the family either. Their older brother, Chase Robert, also has an Instagram account run by their mom. He's signed to the same agency as his sisters.

But Jaqi wrote on her blog that even though her kids are having a blast and getting lots of fun opportunities, having child models int the family isn't all great all the time.

'[One] not so amazing thing about this new life are all of the expenses associated with it! A lot of people assume parents are making money just because they see their kids working a lot. FALSE!' she wrote.

'I know in our case and probably in most cases the parents are putting out more money in order to support their kids,' she went on.

'But I guess if you really put it all into perspective, the money we as parents put out now to support our kids in something they love doing, will allow them to make their own money they can use towards College or a car or a house in the future. So if you think about it, it’s really not so bad after all!'

Hobbies! In addition to modelling, the girls also love dancing and swimming

So gorgeous: Followers have dubbed the identical twins 'the most beautiful girls in the world'

Smiles: Their mother insists that despite questions from critics, her kids are perfectly happy

She's also learned not to put her trust in just anyone.

'Not everyone was so genuine and honest with us. The good thing is, it was a HUGE learning experience for me. One of the most important things I took from this whole experience is before trusting someone to guide you, make sure you know who you are getting involved with.

'This by far has been one of the most stressful, upsetting, mind boggling, and biggest lessons I’ve learned in this industry so far. So make sure you don’t make the same mistake as me! Do your research!

'If something seems a little off with someone you think you should trust, go with your gut instinct. You might be surprised at how many people feel the same way you do!'

She has also taken time to fire back at critics who've had negative things to say about her kids and her parenting.

To those who think her daughters look 'sad,' she said: 'Have you met my girls? Obviously not if you are the ones making this comment.'

To those who think her daughters look 'sad,' she said: 'Have you met my girls? Obviously not if you are the ones making this comment'

Cuties: The girls' brother Chase Robert, who is two years older, is also an aspiring model

Pros: She also said that yes, the girls do wear makeup on professional shoots, done by professional makeup artists

'Although I appreciate your concern, just know my girls are fine! They are happy! They have an amazing childhood with lots of friends that they get to play with everyday!

'A single pose does not define their personality or their quality of life. They are acting... and apparently they are pretty good at it to give off the impression that they are anything but happy go lucky little girls!'

She also said that yes, the girls do wear makeup on professional shoots, done by professional makeup artists.

'Why!? Because that’s how the industry works,' she wrote.

Recently, Jaqi also launched a YouTube page for her daughters, and one of their first videos has been viewed 1.6 million times.